import { makeMap } from "@/utils/index";

// 参考https://github.com/vuejs/vue/blob/v2.6.10/src/platforms/web/server/util.js
const isAttr = makeMap(
  "accept,accept-charset,accesskey,action,align,alt,async,autocomplete," +
  "autofocus,autoplay,autosave,bgcolor,border,buffered,challenge,charset," +
  "checked,cite,class,code,codebase,color,cols,colspan,content,http-equiv," +
  "name,contenteditable,contextmenu,controls,coords,data,datetime,default," +
  "defer,dir,dirname,disabled,download,draggable,dropzone,enctype,method,for," +
  "form,formaction,headers,height,hidden,high,href,hreflang,http-equiv," +
  "icon,id,ismap,itemprop,keytype,kind,label,lang,language,list,loop,low," +
  "manifest,max,maxlength,media,method,GET,POST,min,multiple,email,file," +
  "muted,name,novalidate,open,optimum,pattern,ping,placeholder,poster," +
  "preload,radiogroup,readonly,rel,required,reversed,rows,rowspan,sandbox," +
  "scope,scoped,seamless,selected,shape,size,type,text,password,sizes,span," +
  "spellcheck,src,srcdoc,srclang,srcset,start,step,style,summary,tabindex," +
  "target,title,type,usemap,value,width,wrap"
);

function vModel(self, dataObject, defaultValue) {
  dataObject.props.value = defaultValue;

  dataObject.on.input = val => {
    self.$emit("input", val);
  };
}

const componentChild = {
  "el-button": {
    default(h, conf, key) {
      return conf[key];
    }
  },
  "el-input": {
    prepend(h, conf, key) {
      return <template slot='prepend'>{conf[key]}</template>;
    },
    append(h, conf, key) {
      return <template slot='append'>{conf[key]}</template>;
    }
  },
  "el-select": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach(item => {
        list.push(<el-option label={item.label} value={item.value} disabled={item.disabled}></el-option>);
      });
      return list;
    }
  },
  "el-radio-group": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach(item => {
        if (conf.optionType === "button") list.push(<el-radio-button label={item.value}>{item.label}</el-radio-button>);
        else list.push(<el-radio label={item.value} border={conf.border}>{item.label}</el-radio>);
      });
      return list;
    }
  },
  "el-checkbox-group": {
    options(h, conf, key) {
      const list = [];
      conf.options.forEach(item => {
        if (conf.optionType === "button") {
          list.push(<el-checkbox-button label={item.value}>{item.label}</el-checkbox-button>);
        } else {
          list.push(<el-checkbox label={item.value} border={conf.border}>{item.label}</el-checkbox>);
        }
      });
      return list;
    }
  },
  "el-upload": {
    "list-type": (h, conf, key) => {
      const list = [];
      if (conf["list-type"] === "picture-card") {
        list.push(<i class='el-icon-plus'></i>);
      } else {
        list.push(<el-button size='small' type='primary' icon='el-icon-upload'>{conf.buttonText}</el-button>);
      }
      if (conf.showTip) {
        list.push(<div slot='tip' class='el-upload__tip'>只能上传不超过 {conf.fileSize}{conf.sizeUnit} 的{conf.accept}文件</div>);
      }
      return list;
    }
  }
};

export default {
  render(h) {
    const dataObject = {
      attrs: {},
      props: {},
      on: {},
      style: {}
    };
    const confClone = JSON.parse(JSON.stringify(this.conf));
    const children = [];

    const childObjs = componentChild[confClone.tag];
    if (childObjs) {
      Object.keys(childObjs).forEach(key => {
        const childFunc = childObjs[key];
        if (confClone[key]) {
          children.push(childFunc(h, confClone, key));
        }
      });
    }

    Object.keys(confClone).forEach(key => {
      const val = confClone[key];
      if (key === "vModel") {
        vModel(this, dataObject, confClone.defaultValue);
      } else if (dataObject[key]) {
        dataObject[key] = val;
      } else if (!isAttr(key)) {
        dataObject.props[key] = val;
      } else {
        dataObject.attrs[key] = val;
      }
    });
    return h(this.conf.tag, dataObject, children);
  },
  props: ["conf"]
};
